The Huawei B311221 is a popular 4G LTE Cat6 router, known for its stability, dual-band Wi-Fi, and ability to aggregate frequencies for faster speeds. It is widely distributed by network carriers like Vodafone, T-Mobile, Three, Telstra, and other regional ISPs.

However, there is one major frustration: Carrier locks. If you purchased your B311221 through a mobile network provider, it is likely SIM-locked. This means you cannot use a SIM card from a different carrier.

Unlocking your B311221 opens a world of benefits:

Warning: Firmware updates from Huawei (especially after 2024) have patched many old unlocking methods. This guide is the updated version for 2025.

Before we dive into the code, let’s talk about why this matters. The B311-221 is a workhorse. It supports Category 6 LTE (300 Mbps down, 50 Mbps up), has two external antenna ports (TS-9), and runs on the reliable HiSilicon chipset.

By unlocking it, you gain:

The Huawei B311-221 is a popular 4G LTE router known for its reliability and ease of use. However, if you’ve purchased a unit locked to a specific carrier (like Vodafone, Three, or EE) and want to use a different SIM card, you’ve likely hit a wall.

With recent firmware updates, unlocking methods that worked two years ago (like the standard web dashboard code entry) are often blocked or hidden. This updated guide covers the current, working methods to unlock your B311-221 safely.

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